Final answer:
James was twice the age of Grace minus four years, two years ago. Their specific ages are not required to determine the relationship between their ages at that time.
Step-by-step explanation:
Let's assume Grace's current age is G years old. The problem states that two years ago, James was twice Grace's age. That means two years ago, Grace was G - 2 years old. At that time, James's age would have been 2(G - 2).
To answer the question, we don't need to know Grace's exact current age. We only need to understand the relationship between their ages. Therefore, two years ago, James was 2(G - 2) years old, which is simply twice the age Grace was at that time, subtracting four for the two-year difference and twice as aged at that moment.